curl --request GET \
  --url https://api.example.com/api/playground/sessions \
  --header 'Authorization: Bearer <token>'

{
  "sessions": [
    {
      "id": "<string>",
      "name": "<string>",
      "source": "<string>",
      "status": "<string>",
      "progress": 123,
      "created_at": "<string>",
      "updated_at": "<string>",
      "source_ref": "<string>",
      "row_count": 123,
      "column_count": 123,
      "columns": [],
      "file_size_bytes": 123,
      "file_names": [
        "<string>"
      ],
      "error_message": "<string>",
      "cancel_requested": false
    }
  ],
  "total": 123
}